Question

Is 7×5×3×2+3 a composite number?Justify your answer.

Answer 1

if any number is expressed as product of two numbers it is called as a composite number.
7*5*3*2+3=
3(7*5*2+1)
as 7*5*3*2+3 is expressed as product of two numbers it is composite number.

Answer 2

Answer:

It is a composite number.

Step-by-step explanation:

The said number will be a composite number, since the product 7×5×3×2 is divisible by 3 so the number 7×5×3×2 +3 will also be divisible by 3 hence it would be a composite number.  

Also, If we will divide 7×5×3×2 by 3 the answer will simply be 7×5×2, next we will consider the multiplication 3 (7×5×2+1) the answer will be 7×5×3×2+3 hence this number has factor other than one.

Thus, in common from the given expression 7×5×3×2 +3 will be written as -   = 3 (7×5×2+1) which proves the fact that 7×5×3×2+3 is a composite number

= 7 × 5 × 3 × 2 + 3 = 3(7 × 5 × 2 + 1)

= 3 ( 70+1)

= 3 × 71

Since, it has two factors other than itself and one, thus it is a composite number.